* {
    box-sizing: border-box;
    font-family: 'Segoe UI', sans-serif;
}
body {
    max-width: 700px;
    margin: 20px auto;
    padding: 20px;
    background: #f0f4f8;
}
.container {
    background: #fff;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
.judul-arab {
    text-align: center;
    font-size: 24px;
    margin: 0 0 30px;
}
.bagian {
    margin-bottom: 30px;
    border-bottom: 2px dashed #ddd;
    padding-bottom: 20px;
}
.bagian h2 {
    margin: 0 0 10px;
    font-size: 20px;
    color: #2b6cb0;
}
.keterangan {
    margin: 5px 0 10px;
    color: #666;
    font-style: italic;
}
.tabel-kecil {
    width: 100%;
    border-collapse: collapse;
}
.tabel-kecil th,
.tabel-kecil td {
    border: 1px solid #ccc;
    padding: 8px;
    text-align: center;
}
.tabel-kecil th {
    background: #e9ecef;
}
.tabel-kecil input {
    width: 80px;
    padding: 6px;
    border: 1px solid #ddd;
    border-radius: 4px;
    text-align: center;
    font-size: 16px;
}
.tabel-kecil input[readonly] {
    background: #eee;
    color: #888;
}
.baris-bulan td {
    background: #f8f9fa;
}
.baris-jumlah {
    background: #f0f4f8;
    font-weight: 600;
}
.baris-hasil {
    background: #d1e7dd;
    font-weight: bold;
    font-size: 17px;
}
.tombol-baris {
    text-align: center;
    margin: 20px 0;
}
button {
    padding: 14px 28px;
    margin: 0 8px;
    border: none;
    border-radius: 8px;
    font-size: 17px;
    font-weight: bold;
    cursor: pointer;
}
button:first-child {
    background: #2b6cb0;
    color: white;
}
button:first-child:hover {
    background: #2c5282;
}
button:last-child {
    background: #e53e3e;
    color: white;
}
button:last-child:hover {
    background: #c53030;
}
.catatan {
    margin-top: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    line-height: 1.8;
    font-size: 14px;
}